Cylinder device
US-11994155-B2 · May 28, 2024 · US
with valve stems operated by contact with the piston end face or with the cylinder wall
with valve stems operated by contact with the piston end face or with the cylinder wall · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F15B15/225 |
| Official title | {with valve stems operated by contact with the piston end face or with the cylinder wall} |
| Display label | with valve stems operated by contact with the piston end face or with the cylinder wall |
| Total patents | 29 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2018 | 6 |
| 2020 | 6 |
| 2021 | 11 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Actuator with end stop valve
US-11635097-B1 · Apr 25, 2023 · US
Quick closing valve system and methodology
US-11293263-B2 · Apr 5, 2022 · US
Power steering gear assembly having an end of travel valve assembly
US-11173954-B2 · Nov 16, 2021 · US
Balancer cylinder and workpiece-conveying apparatus in which balancer cylinder is used
US-11167385-B2 · Nov 9, 2021 · US
Pressure booster and cylinder apparatus provided with same
US-11143175-B2 · Oct 12, 2021 · US
Hydraulic actuators
US-11085467-B2 · Aug 10, 2021 · US
Quick closing valve system and methodology
US-2021215019-A1 · Jul 15, 2021 · US
Hydraulic actuator end stroke stop pressure/load control
US-11035392-B2 · Jun 15, 2021 · US
Cylinder device
US-2021164499-A1 · Jun 3, 2021 · US
Hydraulic actuators
US-2021156405-A1 · May 27, 2021 · US
Balancer cylinder and workpiece-conveying apparatus in which balancer cylinder is used
US-2021138596-A1 · May 13, 2021 · US
Pressure booster and cylinder apparatus provided with same
US-2021102558-A1 · Apr 8, 2021 · US
Hydraulic actuator end stroke stop pressure/load control
US-2021079932-A1 · Mar 18, 2021 · US
Hydraulically actuated piston guided in a cylinder, and hydraulic working tool
US-10821593-B2 · Nov 3, 2020 · US
Hydraulic drive
US-10800124-B2 · Oct 13, 2020 · US
Piston assembly for rephasing a fluid-driven actuator
US-10746202-B2 · Aug 18, 2020 · US
Power steering gear assembly having an end of travel valve assembly
US-2020231205-A1 · Jul 23, 2020 · US
Power steering gear assembly having an end of travel valve assembly
US-10647347-B2 · May 12, 2020 · US
Piston assembly for rephasing a fluid-driven actuator
US-2020025223-A1 · Jan 23, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F15B15/225?
- CPC F15B15/225 is the Cooperative Patent Classification code for “with valve stems operated by contact with the piston end face or with the cylinder wall.”
- How many patents are filed under CPC F15B15/225 (with valve stems operated by contact with the piston end face or with the cylinder wall)?
- Our database includes 29 publications tagged with this CPC code.
- Is patent activity under CPC F15B15/225 growing?
- Publication counts under this code: 1 in 2023 vs 1 in 2024 (latest complete years).